Drawing instrument



July 24; 1951 A. GUINEZ DRAWING INSTRUMENT set 1 Filed July 50, 1948 2Sheets-Sh INVENTOR. 76 /22 0 2'0 6.2462222,

ATTU RN EYS July 24, 1951 A. GUINEZ DRAWING INSTRUMENT 2 Shets-Shset 2Filed July 50, 1948 I N VEN TOR.

2W Wm .a A 6 jmiw Patented July 24, 1951 "UNITED STATES PATENT OFFICE.

DRAWING INSTRUMENT Antonio Guinez, New York, N. Y., assignor of fortyper cent to Joseph Blasig, New York, N. Y.

Application July 30, 1948, Serial N 41,431

This invention relates to drawing instruments and scales used bydraftsmen, artists, and the like particularly in connection with drawingboards, and in particular means for resiliently or magnetically holdinga triangle, scale, straight edge, or the like in operative position on adrawing board.

The purpose of this invention is to provide mechanical means foradjustably retaining a triangle, straight edge or the like in operativeposition on a drawing board without using the left hand for this purposewherein both hands are free.

In general use an artist, draftsman, or the like, who uses his righthand for drawing, holds a T-square, triangle, or the like with his lefthand and makes a mark, line, or the like with a pencil or pen in hisright hand. The left hand is, therefore, occupied at all times. Withthis thought in mind this invention contemplates a magnet for holding asteel triangle or straight edge to a steel strip at the edge of a board,or a spring clip for holding the triangle or straight edge to the boardor the combination of the magnet with the spring clip and a hingewhereby the triangle or straight edge may be adjustably held and at thesame time readily moved from one position to another. The object of thisinvention is, therefore, to provide means for retaining drawinginstruments and the like on a drawing board or flat surface withoutholding the devices by hand.

Another object of the invention is to provide means for mechanicallyholding drawing instruments on a board which may be used on boards ofdifferent types and sizes.

A further object of the invention is toprovide means for holdingtriangles, straight edges, scales, transparent sheets and the like todrawing boards which is of a simple and economical construction.

With these and other objects and advantages in view the inventionconsists of the new and useful combination, construction, andarrangement of parts as hereinafter more fully described, set forth inthe claim appended hereto, and disclosed in the accompanying drawingsforming part hereof, wherein:

Figure l is a plan view illustrating spring clips holding sheets oftransparent material over a scale or edge of a drawing board.

Figure 2 is a cross section through the device shown in Figure 1.

Figure 3 is a View showing a spring clip holding one scale perpendicularto another.

Figure 4 is a cross section through the device shown in Figure 3.

1 Claim. (01. 334m Figure 5 is a detail illustrating the spring clipshown in Figures 3 and 4.

Figure 6 is a plan view showing a section .of a drawing board with partsbroken away showing a hinge held on the edge of a drawing board by aspring clip and a triangle held to the hinge by a magnet.

Figure '7 is a cross section through the device shown in Figure 6.

Figure 8 is a View illustrating a hinge frictionally holding a scale toa straight edge with the hinge held by a spring clip.

Figure 9 is a view showing an end elevation of the device shown inFigure 8.

Referring now to the drawings wherein like reference characters denotecorresponding parts the spring actuated devices for retaininginstruments in position upon a drawing board or the like of thisinvention includes spring clips [0 and ll, a hinge I2, and a magnet I3.

As illustrated in Figure l the spring clips I0 which have jaws I4 and 15held by a spring l6, grip a U-shaped sheet ll of clear plastic or othersuitable transparent material over a scale l8 hav-- ing a graduated edge[9, and with the parts positioned in this manner the sheets I! may beslid along the scale and used as desired.

In Figures 3, 4 and 5, the spring clip ll, having a base 20 holds agraduated scale 21! over a straight edge 22 with the straight edgepositioned on the base and extending under the roll forming the clip,and with the end of the scale 2| also extending under the roll andpositioned upon the straight edge. With the parts arranged in thismanner the scale may readily be slid along the straight edge and used inany position desired, and the parts may be used as a T-square or otherdrawing instrument.

In the design shown in Figures 6 and I the hinge l2 which is providedwith plates 23 and 24 is clamped to the edge of a board 25 with a springclip 26 having jaws 21 and 28 held by a spring 29 and provided withsuitable handles, and a triangle 32 is held in position upon the boardby the magnet l3. The hinge and triangle are formed of material havingmagnetic attraction, and it will be understood that the hinge andtriangle may be of any suitable type or design. The triangle which isusually held against a T-square or straight edge by hand is, therefore,retained in position by the magnet and hinge so that both hands arefree.

In Figures 8 and 9 the plates of the hinge are clamped over a straightedge or bar providing a head 33 and the end of a straight edge providinga tongue 34 by a spring clip 35 and with the parts arranged in thismanner the tongue may be slid along the head and used as desired.

A straight edge or scale or a spring clip of any suitable type or designmay be used and the different elements may be combined as desired.

It will be understood that other modifications may be made in the designand arrangement of the parts without departing from the spirit of theinvention.

What is claimed is:

In a T-square, the combination whichcomprises a bar providing a head, astraight edge providing a tongue positioned on the head and extendedoutwardly therefrom, a hinge having hinge plates extended therefrompositioned with one of said hinge plates extended below the head and theother on the end of the tongue positioned on the head, and a cylindricalspring having a slot in one side positioned over the hinge with theplates of the hinge extended through the a said slot whereby thecylindrical spring clamps the tongue to the head.

ANTONIO GUINEZ.

4 REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date Re.11,189 Carr Sept. 15, 1891377,526 Levy Feb. 7, 1888 434,911 Birge Aug. 26, 1890 802,202 DouganOct. 17, 1905 1,679,084 Hooper July 31, 1928 1,759,989 Leaman May 27,1930 1,849,493 Larkin Mar. 15, 1932 2,214,395 Woody Sept. 10, 19402,375,427 Mannino May 8, 1945 FOREIGN PATENTS Number Country Date 3,658Great Britain Mar. 1, 1889 3,801 Great Britain Feb. 15, 1904 6,484 GreatBritain Mar. 14., 1914 376,843 Germany June 5, 1923

